Basalt and gabbro are compositional equivalents, which means that they ____.
A)are both formed from the same pluton
B)have the same texture but are made up of different minerals
C)are made up of the same minerals and are the result of explosive igneous activity
D)are made up of the same minerals but have different textures
E)have the same texture but one is mafic and the other is felsic

Question

Quizplus · Accepted Answer

Basalt and gabbro are both igneous rocks that are made up of the same minerals, such as plagioclase feldspar and pyroxene. However, they have different textures - basalt has a fine-grained texture while gabbro has a coarse-grained texture. Therefore, they can be considered compositional equivalents.

Basalt and Gabbro Are Compositional Equivalents, Which Means That They